2004

288 | Chapter 16 Draw Geometric Objects
With AutoCAD, there are two methods for creating splines:
■ Create spline curves with the Spline option of PEDIT to smooth existing
polylines created with
PLINE. Such spline-fit polylines are created with
uniform knot vectors and are more likely to be included in drawings
created with earlier versions of AutoCAD.
■ Create splines, which are NURBS curves, with SPLINE. Drawings
containing splines use less memory and disk space than those containing
spline-fit polylines of similar shape.
You can easily convert spline-fit polylines into true splines with
SPLINE.
See Also
“Modify Splines” on page 418
To convert a spline-fit polyline to a spline
1 From the Draw menu, choose Spline.
2 Enter o (Object).
3 Select a spline-fit polyline and press
ENTER.
The selected object changes from a polyline to a spline.
To convert a spline by specifying points
1 From the Draw menu, choose Spline.
2 Specify the start point for the spline (1).
3 Specify points (2 through 5) to create the spline, and press
ENTER.
4 Specify the start and end tangents (6, 7).
1
2
3
4
5
6
7